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Search: id:A154534
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| A154534 |
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Odd nonprimes n with smallest digit of n + number of smallest digits of n = odd nonprime. |
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+0
1
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| 77, 89, 105, 201, 203, 205, 207, 209, 301, 303, 305, 309, 403, 405, 407, 501, 505, 507, 603, 605, 609, 703, 707, 779, 803, 805, 807, 899, 901, 903, 905, 909, 1011, 1015, 1017, 1023, 1025, 1027, 1029, 1035, 1037, 1041, 1045, 1047, 1053, 1055, 1057, 1059, 1065
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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If n=77=odd nonprime, 7=7 and 7+2=9=odd nonprime, then 77=a(1). If n=89=odd nonprime, 8<9 and 8+1=9=odd nonprime, then 89=a(2). If n=105=odd nonprime, 0<1<5 and 0+1=1=odd nonprime, then 105=a(3), etc.
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CROSSREFS
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Cf. A141468.
Sequence in context: A033397 A052202 A089525 this_sequence A061671 A064902 A127335
Adjacent sequences: A154531 A154532 A154533 this_sequence A154535 A154536 A154537
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KEYWORD
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nonn,base
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AUTHOR
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Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Jan 11 2009
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